Crichton-Browne sign

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Crichton-Browne Sign

Crichton-Browne Sign (pronounced: KRI-ton-BROWN sign) is a medical term used to describe a specific neurological symptom. It is named after the British neuropsychiatrist, Sir James Crichton-Browne.

Etymology

The term is named after Sir James Crichton-Browne, a prominent British neuropsychiatrist in the late 19th and early 20th centuries. Crichton-Browne was known for his extensive research in neurology and psychiatry, and this sign is one of his many contributions to the field.

Definition

The Crichton-Browne Sign refers to the abnormal pupil reaction to light in patients with neurosyphilis, a specific type of syphilis that affects the nervous system. This sign is characterized by the constriction of the pupil on the side of the lesion when the opposite eye is exposed to light.

Related Terms

  • Neurosyphilis: A specific type of syphilis that affects the nervous system.
  • Pupil: The black circular opening in the iris of the eye, which allows light to enter the retina.
  • Neurology: The branch of medicine dealing with disorders of the nervous system.
  • Neuropsychiatry: A branch of medicine that deals with mental disorders attributable to diseases of the nervous system.
  • Syphilis: A sexually transmitted infection caused by the bacterium Treponema pallidum.

See Also

  • Argyll Robertson pupil: A condition where the pupil constricts when the patient focuses on a near object (accommodation) but does not constrict when exposed to bright light (pupillary light reflex).
  • Holmes-Adie syndrome: A neurological disorder characterized by a tonically dilated pupil that reacts slowly to light but shows a more definite response to accommodation.

External links

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